Sectional fire-box.



N oooooooqoooo Patented Apr. 6, 1'909` 6 BHEETB-SHEBT 1 SEGTIONAL FIRE BOX.

APPLIoATIoN FILED SEPT. 11, 1907.

' I. W. SHUPERT & E. W. JACOBS.

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7/ Y MN F. W. SHUPERT & H. W. JACOBS.

sBcTIoNAL HRB BOX.

APPLICATION FILED SEPT. 11I 1907.

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SEGTIONAL FIRE BOX. APPLICATION I'ILED s221211, 1907.

PatenteApr. 6, 1909.

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ANN

F. W. SHUPERT & H. W. JACOBS.

SEGTIONAL FIRE BOX.

ArPLIoATIoN FILED SEPT. 11, 1907.

Patented Apr. 6, 1909.

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F. W. SHUPERT & H. W. JACOBS.

SEGTIONAL FIRE BOX. APPLIUATION Him umn, 1901. 917, 172B Patented Apr. 6, 1909. 6 SHEETS-SHEET 5.

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F. W. SHUPBRT & H. W. JACOBS.

SEGTIONAL FIRE BOX.

APPLICATION FILED SBPT.11, 1907.

Patented pr. 6, 1909.

6 SHEETS-SHEET 6.

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FRANK w. SHUPERT, orl SAN BERNARDINO, CALIFORNIA, AND HENRY w JACOBS, OF

TOPEKA, KANSAS, ASSGNORS TO THEMSELVES AS TRUSTEES.

ySEfyflftlhAIa FIRE-BOX.

Application led September Athe accompanying drawings, in whicli- Figure l is a longitudinal, sectional view ot a fire-box embodying the invention; Fig.

is a transverse sectional view of l;

llo

Fig. 3 is a partial side elevation of a waterleo'; Fig. et is a sectional view of Fig. 3; Fig. 5 is a view on the line 5-5 of Fig. 4; Fig. o illustrates the application of the invention to a iirebox having the baclr end built at angle to the vertical.; Fie. 7 is a trans- `verse sectional view oit Fig. 6, the right halt' of Y' being taken on the lineas-y of Fig. o, i the lett halt o' Fig. 7 being' taken on the line :vif-wi of Fig. o; Figs. 8, 9 and l() are views si-inilar to Figs. 3, 4f and 5, illustrating' another embodiment of the manner of Staying" ll is a longitudinal sectional `View ot' another embodiment of my invention: 12 is a transverse sectional view of the nre-box ot ig. il, the right side showsection taken on the line 1/, and the side Showing a section taken on the line m-n. Fig. 13 is a halt plan of the bottom ci a :lire-box showing the shape of the sectional :sind ring. Figs. l-l and l5` are .respectively side and end elevations of a stay sheet. Figs. 16 and 17 are respectively a pian view and a side elevation of one inud ringn section; and Figs. 18 and i9 are similar views of'aiiother inud ring' section.

The obje-ct- O the invention has been to devise la fire-bott having any or all of the `following advantages: IThat oi having such tl'ezrioility as will prevent all unequal or eX- cessive strains, such asthe crown and side- Slieets of the ordinary lire-box are subjected to. That 'ot preventing; the `heads ,of 'the stay-bolts on the Side and crown sheets from coming in direct. lcontact with the flame.'

'that of havingv all side and. crown sheets tler-iible. That of having few and large stays. That ot' preventine the exposure of all seams about the fire ox to the darne. That of increasing the steaming power of specification @i Leiters rasant.

Patented April 6, 1909.

11, 1907. Seal. N0. 392,398,

U-sliape in cross-section. rEhe foremost section A is riveted to the flue-sheet B; the Sections are riveted to each other, and the rearmost section A is riveted to the inner bach-sheet C. The bottoms of the sections 'it are overlapped and are riveted to an angle-plate D. Copper callring strips -E may be placed between the tla-nges ot'th'e sections A where they are riveted together, anden each-side of the said strips or plates F may be placed, rivets passing through both ot the strips it, danges of the sections A and the copper callfring strips, insuring a tirfht joint.- The seanis can easily be callred :trom the inside of the tiratori, thus easily stopping any leal; that may be started in the Stearns. in order to Support the sections 'A troni the shell Vagainst the pressure tending to force them inward upon the fire. slings H are secured to the said flanges by rivets l passing through the slings, the strips l? and the said flanges. Along the top ot the tire-boi: 'the slings H are connected with the shell by means of stays L, which are swiveled in the slings, threaded in the shell sheet, and headed over onto the outside of said sheet. ln the waterlegs the slings d have threaded into them stay-bolts M, whose heads m are held to the shell b means or channel-estrias N that are secure to the shell by rivets The staybolts have round heads and they are passed through holes in the shell sheet which are beine preferably or tapered forni. rlhe square sockets m and thes'taybolts can be removed by first removing the correspondmtl bolt y means ot a'niole'wrench ttte'd inte the square socfiet in the stay-bolt.

formed of comparatively thin material and closed by means of waterplngs l), the latter hea s fm of the stayboltsfare provided withV lug ll and ther'r'giinscrewing the stayin-f This construction valso enables the stay-bolts to Ibe shortened or lengthened as desired.

It will be observed that the rebox illustrated in Figs. 1 to 5 has, among others, the

5 following advantages: Owing to the U- shape of the sections A, the lire-box isilexi- -ble and can yield to all strains caused by unequal heat or other causes, without un' duly communicating such strains to the tlues and side sheets, as in the ordinary fire-box. The stay-bolt heads are not exposed to direct contact with the flame, and there is, therefore, no danger of their being burned. The crown and side sheets are all flexible, thus enabling themto adapt themselves to strains so that practically the only strains to which they are subjected are tensile strains which are the strains they are best able to maintain. This results in a very low costy of maintenance, owing to the fact that there is little danger of breakage of, stay-bolts. lt also enables the use of fewer stays than heretofore, and, therefore, larger ones,yand as the stays are only subjected to tensile strains, they can be made of steel instead of iron, without danger of breaking. The increased size of the staybolts makes them less subject to corrosion than smaller ones. None of the seams of the lire-box are exposed to the flames, 4a condition which resul-ts in the least possible leakage. at the seams. The form of the sections A is such as to increase the heating surfaces in the most eHective manner, and to permit the use of thinner fire-box sheets than in the ordinary-construction, thus in- 'creasing the steaming power of the boiler'. The sectional construction of the fire-box permits the removal of any defective section 40 without necessitating the throwing away of the entire crown sheet. It is only necessary4 to replace the injured section by a new one. In that embodimentl of the invention shown in Figs. 6 and 7, the invention is shown as a plied to a boiler in which the back end ci) the boiler-is at an angle with the vertical. The details of the construction `are the same as those illustrated in the earlier figures, except in the followingl particulars: The left water-leg has the same j form. of staying as that illustrated inthe earlier figures. The right water-leg, how-- ever, shows each stay-bolt Q independentl secured in the shell sheet R. The bolts v preferably have heads g. that are spherical on the underside, and these heads are seated in spherical sockets formed in` plates S which arepreferabl circular, the said plates being inde endent y secured in the shell sheets by rivets T. A hole s through the plate S for the passage of the -bolt Q ,isvalso `made 'flaring so' that there is room for the boltto swing as its head turns in its spher'- I ical socket. This construct-ion makes, mefv fect, a ball and socket joint between the staybolts and the shellsheet and thus enables the bolts to readily adapt themselves to all changes in the relative positions of the parts which theyconnect. In this embodiment of the invention, no strips are shown upon each side of the flanges u of the sections U, said flanges being made of suliicient thickness to enablethem to be rigidly secured together.

In that embodiment of my invention which is shown in Figs. 11 to 19 inclusive. theeonstruction, except in those pz'lrticulars` pointed out` is'substantially the same as in the preceding figures. Instead of using stay-bolts, stay-plates V,.of the form illustrated in Figs. 14"and 15, are placed between the sectionsVV and X of the crown sheet and riveted in place.- The outer shell Z instead, as heretofore, of being' made of a single sheet is made of a series of sections .e

that are channel-shape in cross-section, their forward and rear edges being turned `upward to form ianges, and the said flanges receiving between them the outer edges ot' the said sheets V, and being;r riveted thereto. The said sheets V have holes c formed therein to afford a ready circulation of water and steam. The 'rear end of the lire-box is of the ordinary rigid stay type. The mud ring is preferably formed by cup-shape sections which are riveted into the open spaces of the lower ends of .the water-legs. ,The mud ring sections A and B', at the front and rear, are long and straight. yThe mud ring sections C and D are of the form shown in Figs. 16 and 17 and-18 and litre-- spectively. The ,sections C are to close the water-legs whose crown sheet sections are seinicircular in form, and the sections D are to close the water-legs whose crown sheet sections are elliptical in form. These mud ring sections are of boiler steel and `may be flanged into place while hot thus insuring tight seams.

'lhe forming of the shell sheet in sections has decided advantages. Any one section may `be removed and replaced without necessity for discarding the ent-ire shell sheet. The rivets are on the outside and are easily gotten at. In this form of our invention, as in those previously described, there are no rivet or bolt heads exposed to the fire to be burned olf.

It is obvious that various changes can be made in the above illustrated construction, which will embody the principles of the invention, and it is desired that the claims be given the broadest interpretation of which art.

We claim 1. In a boiler,- a fire-box consistin of the combinationv of a series of llexib e sheet metal. inner sections, U-shape in cross-section, the flanges of said .sections extending outward, said sections being riveted t0- the)7 are capable, consistent with the prior sienes gether, exposed to the lire bulge toward the lire, and an outer shell to which each of said sections -is fastened.

2. In e. boiler, e fire-box consisting ofthe combination of e series of U-sheped sections having their enges secured to ether, the surfaces exposed to the fire being ulgcd toward the fire, and an outer shell to which each of seid anges is connected, seid outer shell being made of e corresponding series of sections.

3. In a boiler, e lire-box consisting of en inner shell and en outer shell, seid inner shell comprising e series of U-sheped sections having langes projecting outwardly vand secured. together, the surfacesr of which that ere exposed to the tire being bnlged toward the fire, a rear flue sheet and en inner beck sheet to which the front and rear sections respectively are riveted, ell of the joints between such ports being 'formed transversely to the lengthoi" the fire-box, whereby ell of the rivets used in such joints iney be protected from the tire, and ineens connecting each of said sections to the outer shell ot the hre-box.

et. ln e boiler, a tire-box coinprisingl inner and outer shells, the inner section being termed of ll-shaped sections, the flanges ot which project outwardly, the surfaces ci seid sections exposed 'to the tire being bulged towsrd the lire, the seid outer shellbeing composed of lll-shaped sections having ontwordly projecting flanges, and stoy plates riveted between the flanges of sdjecent inner sections end between the flanges of od' jocent outer sections.

5. ln o boiler, s tire-box coinprisng inner end outer shells, the inner section being -foi-ined ci tl-sheped sections, 'the iienges oi' which project ontwardl the surfaces oi" scid sections exposed to tlie re bnlged toward the tire, the -seid outer shell being composed of lil-sho ed sections hei/ing ontwerdly projecting f Jnges, steypletes riveted between the anges oi adjocent innerl sec- .tions :ind between 'the flanges of edjacent outer sections, e rear due sheet, stoy plete interposed between the outwardly projecting flange ot the edjecent inner section end seid tine sheet ond riveted thereto, seid stoy plate being riveted between adjacent sections ot the outer shell. i

6. ln :i boileige hre-bon comprising inner end outer shells,the inner shell. being iornied of ll-shoped sections, the flanges of'which project outwardly, the surfaces oir seid sections exposed to 'the hre bein@r bolged towerd the re,the said outer shell being coniposed ci lll-shaped sections having outwardly projecting flanges, stay plates riveted between the den es of adjacent inner sections end between t e flanges of adjacent outer sections, a. rear Hue sheet, a stay plete inand having their surfaces which erel terposed between the ontwnrdly projecting Hangs of the adjacent inner section and sind ilue sheet ond riveted thereto, seid stoy plate being riveted between adjacent sections of the outer shell, an.l inner rear sheet, e stay plete riveted between said sheet end the outwardly projecting ange of the adjecent inner section, and en outer rear sheet, seid stoy plete being riveted between l'the outwardly projecting iienge of the corresponding outer section ond on outwardly projecting ange formed on the resi' outer sheet. 7. ln e boiler, e hre-box consisting oi the combination of an inner shell ond en outer shell, seid shells being formed of corresponding il shaped sections having outwardly projecting Hongos, the surfaces of the innersections which ere exposed to the lire being bulged toward the tire, and ineens for staying seid inner sections from. seid outer sections, the side wells oiI the hre-box being vertical.

8. ln n boiler, the combination of a shell, e line-sheet, on inner boei; sheet, sheet metal sections termin the lire-bon, seid sections having ontwer ly projecting denges that nre secured together, the front section being secured to sei tine-sheet, end the rear section being secured to seid innei` beck sheet, end stays connecting seid sections with said shell.

9. ln e boiler, e tire box consisting oi? transverse sections united together, end e. mnd ring composed oit corresponding sections.

l0. ln e boiler, s tire box consisting of transverse sections comprising open-bottomed water-legs, end n mnd ring composed of cup-shaped sections iisstened in seid open bottoms.

li. ln o boiler, e lire bei: consisting oi' the combine-tion oi en coter shell, en inner shell formed oit e series oli Uoheped sections having their donges secured together, the snr- ;teces ex osed to the dre beinen bnleed t'owsrd the Eire, end stoy pistes secured to seid flanges and to the outer shell, stoy pistes being provided with openings to nilord coniinunicetion between the sections.

l2. in e boiler, the combination oi s shell, o ilse-sheet, en inner boch sheet, sheet metal sections forming. the 'lire-box, seid sections having outwardly projecting liengcs that are secured together, the 'front section being secured to seid diie-sheet, the reorsection being secured to seid inner bscl sheet, steys connecting seid sections with seid shell, the .ieet oit seid sections being flattened end overlapping, ond on nngleplete secured to seid feet end to seid shell.

i8. lin s boiler, o lire-bon consisting of shell and crown sheets inode np of transverse ll-shops sections, stoy sheets thot ere riveted into the seems formed by said sections, whereby eoch poir oi sections forms e pairof Water-legs, and cup-shape mud-ring sections inserted into the bott-oms of said water-legs and secured in place.

l4. In a boiler, a fire-box Consisting of shell and crown sheets made up of trans- ,verse U-shape sections, stayv sheets that are riveted into theseams formed by said sections, whereby each pair of sections forms a pair of water-legs, and inverted cup-shape I mud-ring sections inserted into the bottoms 1o of said Water-legs and secured in place.

` 1n testimony that We claim the foregoing we have hereunto set our hands.

FRANK W. SHUPERT. HENRY W. JACOBS.

Witnesses:

W. E. LEONARD, J. E. LAN'rs. 

